last post on this one ,got car back august 26th (had no broadband prob so this is late)finally found out what was wrong with it,apparently the exhaust gas sensor had failed ,but it wouldn't diagnose itself so car had been running with no dpf regeneration for quite some time,this resulted in complete failure of all the emissions systems,seat recognised that this obviously wasn't my fault and agreed to fix it under warranty,but also agreed to replace full DPF system at there cost (not covered under warranty ) so after 27 days car was returned to me ,running fine but what a nasty experience it was ,my advice now for anyone thinking of buying a seat would be think twice ,cars are great(when running) but after sales is a long way from any past experiences ive had.